**Trader consensus across the evenly split 84–93°F ranges reflects substantial forecast uncertainty for Miami’s September 6 maximum, driven by the timing and intensity of afternoon convection.** Typical late-summer conditions feature high humidity, light southeasterly flow, and sea-breeze convergence that triggers thunderstorms after peak heating, often capping the daily high in the upper 80s to low 90s. Model guidance as of September 4 shows scattered to numerous storms possible during the afternoon window, with any earlier or stronger activity lowering the peak while delayed or weaker convection would allow readings near or above 90°F. Historical September averages near 88–89°F and the 15–20% chance of 90°F+ days underscore how small shifts in moisture, instability, or steering winds can move the outcome across multiple market bins. Updated National Weather Service and mesoscale model runs over the next 48 hours will likely clarify the primary resolution driver.